Alexander Pfeiffer Alexander Pfeiffer Nanditha Krishna (Independent Researcher) Nanditha Krishna Zentrum für Angewandte Spieleforschung, Universität für Weiterbildung Krems 2025 The proliferation of AI-generated deepfake media represents a critical global challenge, undermining public trust across political, financial, and social domains. Recent advances in generative AI, particularly Google’s VEO3 model, have dramatically escalated the sophistication and accessibility of synthetic media creation, enabling the generation of photorealistic videos with synchronised audio that are nearly indistinguishable from authentic content. Existing approaches, primarily focused on deepfake detection, fall short due to the evolving sophistication of artificial intelligence methods and the emergence of what researchers term the “liar’s dividend”—the ability for bad actors to dismiss authentic content as potentially fake. This opinion paper introduces a technically feasible solution: the optional integration of cryptographic hashing, secure metadata anchoring (including GPS coordinates and device specifications), and optional digital identity signatures (eIDAS, EUDIS, or decentralised Self-Sovereign Identity frameworks) directly into media-capturing devices such as smartphones and cameras. These authenticity markers would be immutably anchored to public blockchain infrastructures—examples include Ethereum Layer 2 solutions, Solana, and Ardor—creating an incorruptible provenance ledger. The article examines the multiple advantages of such blockchain-based media authentication, including strengthened content integrity, clear provenance, rapid verification capabilities, deterrence of misinformation, protection of intellectual property, and resilience across decentralised platforms. Despite its promise, the implementation faces challenges related to privacy and anonymity concerns, device integration complexities, scalability, verification infrastructure, and evolving legal and regulatory landscapes. To overcome these barriers, parallel initiatives in user and stakeholder education are crucial, emphasising media literacy, transparency, and global inclusivity. By collaboratively addressing these issues, blockchain-based media authentication has the potential to significantly mitigate the impact of deepfakes and rebuild digital trust in society. PDFDocument eng 2025-07-30T07:12:50.505163Z 2025-07-30 Blockchain Media Authentication Deepfake Detection Digital Provenance Synthetic Media Content Integrity Verification Cryptographic Timestamping Media Forensics Information Authenticity 551406 b application/pdf http://rightsstatements.org/vocab/InC/1.0/